tag	line	file	source code
sysv_count_free_inodes	550	fs/sysv/inode.c	put_fs_long(sysv_count_free_inodes(sb), &buf->f_ffree);  /* free file nodes in fs */
sysv_count_free_inodes	379	include/linux/sysv_fs.h	extern unsigned long sysv_count_free_inodes(struct super_block *sb);